Spring construction



, 1,618,579 Feb. 22, 1927- F DARCY SPRING CONSTRUCTION Filed Dec.9, 1925Patented Feb. 22, 1927.

UNITED STATES FRANK P. DARCY, OF KALAMAZOO, MICHIGAN.

SPRING CONSTRUCTION.

Application filed December This invention relates to springconstructions and comprises all improvements over the prior art whichare disclosed in this hend the essential features of the improvements,drawings illustrating a preferred form have been annexed as a part ofthis disclosure.

-Fig. 1 is a perspective View of portion of a chair bottom with thespring construction applied thereto.

Fig. 2 is a bottom plan view of one of the spring slats forming part ofthe spring construction in Fig. 1.

Fig. 3 is a side view of one of the spring slats.

The spring construction comprises three spring slats 1 secured by nails2 or otherwise to the bottom of a chair 3. A covering of canvas or othermaterial preferably is placed on top of the spring slats, and on thecanvas is placed hair or any other suitable filling material, and thenover this is placed a finish covering of any desired material such asleather, velvet, etc.

Each spring slat 1 comprises two metal strips 4, 5, each strip beingprovided with fastening holes 6 for nails or the like. Strip 1 has astruckup or pressed out projecttion 7 and a slot 8. Strip 5 has also astruck up or pressed out projection 9 extending through slot 8 of stripa. Spring 10 has ends 11, 12 respectively engaging in the loops formedby pressed out projections 7, 9.

Thus the spring 10 holds pressed out projection 9 normally pressedagainst the end 13 of slot 8 and the portion 9 also holds strip 5 fromundue lateral displacement relative to strip 4.

In operation, when pressure is placed upon strips 4, 5 (Fig. 1) theymove endwise away from each other and bow downward thus bringing springs10, located on the underside, into action and stretching 9, 1925. SerialNo. 74,308.

the springs, the projections 9 moving along slots 8. When pressure isrelieved, springs 10 contract and move projections 9 back against ends13 of slots 8 thus causing strips 4:, 5 to move endwise toward eachother to raise the strips to normal position again.

Without further elaboration, this disclosure will so fully reveal thegist of the improvements that others can, by applying current knowledge,readily vary these improvements without omitting certain features that,from the standpoint of the prior art, fairly constitute essentialcharacteristics of the generic and specific aspects of theseimprovements, and therefore such variations are intended to becomprehended within the meaning and range of equivalency of thefollowing claims:

I claim: 1. In a spring construction, spaced supports and a plurality ofslats extending from one support to another, each slat comprising a pairof overlapping strips, one strip havmg a slot and the other strip havinga projection engaging in said slot, and a spring connecting said onestrip with the projection on said other strip.

2. In a spring construct-ion, spaced supports and a plurality of slat-sextending from one support to another, each slat comprising a pair ofoverlapping strips, one strip having a slot and the other strip having apressed out projection engaging in said slot, and a spring connectingsaid one strip with the pressed out projection on said other strip,

3. I11 a spring construction, spaced supports and a plurality of slatsextending from one support to another, each slat comprising a pair ofoverlapping strips, one strip having a slot and a pressed cutprojection,and the other strip having a pressed out projection engaging in saidslot, and a spring connecting the pressed outprojection on one stripwith the pressed out projection on the other strip.

4. A spring slat comprising, a pair of overlapping strips, one striphaving a slot and the other strip having a projection extending throughsaid slot, and a spring connecting said one strip with said projection.

FRANK P. DARGY.

